Stephen hughes



s. HUGHES.

Mm Bolt.

No. 88,875. Patented April 13, 1869,

STEPHEN HUGHES, OF HAMILTON, OHIO. Letters Patent No. 88,875, dated April 13, 1869.

IMPROVED BEAN-DUSTER.

The Schedule referred to in these Letters Patent and making part of the same.

the brushes are worn on the burr, or cylinder, it is low.- ered to a certain point. It is then raised, and the brushes set by means of the set-screws, and the same operation repeated. The operation of setting out the brushes will be required about once a year.

This .increased current of air, in this class of bolts, is of the greatest importance. Success depends on it. From the heat created within the cylinder, by the great speed of the burr, and friction of the brushes against the wire gauze of the bolt, the flour becomes clammy, or adhesive, and will not pass through the bolt without great difficulty. By means of my concave sides, I find this difficulty overcome, as I can run my burr at a speed of one hundred and .twenty revolutions per minute, and do its work efi'iciently, forcing the flour through without becoming heated or clammy, which is necessary to preserve the flour. This increased current of air I obtain by the form of my burr, with four concave sides and conical. In these grooves are placed the adjustable brushes D, secured therein by set-screws.

The flanges E E, on each side' of the adjustable brushes, serve as guards andsupports to the brushes, and retain them in a proper radial position when the machine is in operation, whereby they are caused to act upon the material, in connection with the bolt, in a more efficient manner, and also admit of being set outwardly, from time to time, to compensate for any wear to which the brushes are subject.

The conical bolt is constructed of the frames and ribs a a a, with an inner covering, of wire cloth or other suitable material for-bolting flour. I

The section of the bolt represented in fig. 2, constitutes one-fourth of the entire'bolt, and the sections are fastened togetherby screws, and retained in a fixed position by means'of a bead on the under side of the cover of the chest A, and by a rabbet, or'flange around the periphery of the chamber 11, constituting the bottom of the bolting-apartment.

This chamber H is supported by radial arms 1, extending to, and secured firmly to, the corner posts of the flour-chest. The chamber-H is suspended, or held some distanceabove the bottom, or floor of the flour-chest, and is of a form corresponding with the tapering, or conicalshaped bolt B, as represented in the drawing.

The top of the chest is open around the shaft, which passes through the centre of the machine, and the materialis fed into the belt at this .opening.

The vertical shaft K passes through the centre of the burr O, and the latter is permanently secured thereon; and this shaft is stepped in a cylindrical oilcup, resting.'upon the hinged adj ustiug-bar L, and retained in a central vertical position in the barrel of the bridge-rail M, which is fastened to the two lower ties of. the frame whichsupports the'flour-chest A.

One end of the band L extends through a loop at the lower. end of the adjusting-screw, which passes To all whom it may concern:

Be it known that I, STEPHEN HUGHES, of Hamilton,

'Butler county, Ohio, have invented a new and useful Improvement in Bran-Dusters, for separating flour from bran; and I'do hereby declare that the following is a full and exact description thereof, reference being bad to the accompanyingdrawings,and to the letters of reference marked thereon.

Figure 1 is a perspective view of my improved branduster, with one side removed from the outer case, and one section of the conical bolt taken out, to exhibit the winged burr, with its brushes.

Figure 2 represents one section, constituting onefourth of the bolt, detached.

Figure 3 is a view of the burr with its brushes.

My invention relates to that class of flour-bolts designed to separate the flour from the offal, or bran, which has passed through the common bolt of the grinding-mill; and consists in the arrangement of the bolt and brushes in such relation to each other as to cause the material to fall upon the bolts inclined inner face, when fed intb the machine, which action, together with the upward current of air generated by the revolving winged burr of brushes, tends to retain the material longer in the machine, and retards its gravitating action sufficiently to effectually separate the flour from the bran before the latter reaches the bottom of the machine, where it is discharged; also, it consists in the employment of the inverted frustum, or part of a cone-shaped bolt, in combination with a correspondingly-formed winged, or fluted burr, with adjustable guarded brushes, and an adjustable step, all of which will be herein more fully described.

The letter A indicates the chest, which is a square structure, enclosing the bolt B and the fluted burr U. The latter is grooved at each extremityof its wings, which are the lateral terminations, or boundaries of the four concave, or fluted faces of the burr.

The great advantage gained by the concave foursided burr, over a cylinder-burr, is, the enlarged space which it forms between it and the bolt, or cylinder, each side, or concave forming an independent chamber, in which a greater current of air is created, while in motion, than can be made with an entirely-round burr, to which brushes are attached. In round burrs, the only space between the bolt and burr is the length of the brushes.

An open cylinder is liable to great waste, owing to the finest flour drawing on the inside of the brushes, close to the shaft, and not having current enough passing through the wire gauze to draw it out, it falls to the bottom, and passes out .with the offal; hence the nel cessity of a closed-up shaft and cylinder, carrying as much air as possible, with as great pressure as possible, to force the flour through the bolt, with the aid of the brushes.

The great object of this machine is, that it can be adjusted while in motion, by lowering the burr. When 7 but the flour-chest may be of sufficient capacity to the bolt, and these brushes are subsequently, from time to time, as they wear oil, brought in proper contact with the bolt, by lowering the burr G, by means of the adj ustiug-mechanism, consisting of the hinged lever, or bar L, screw-loop and milled nut N, which will raise and lower, the oil-cup, and shaft K, with the burr O, to which the brushes are secured, as already described.

After the burr O has been thus adjusted to its lowest position, to bring the brushes in contact with the bolt, the burr should be raised to its highest position, and the brushes D set outwardly by the set-screws, which retain them in their grooves, when the operation of lowering the burr 0 may be repeated, to compensate for the wear of the brushes.

.By this manner of constructing and operating the burr, the brushes are uniformly held in proper relation to the bolt to efficiently perform the work of separating the flour from the material; and the same set of brushes are capable of being used for a much longer period, for the purpose proposed.

I am aware that flowing-bolts have been proposed with a conical dresser of brushes, adjustable, with a view to compensate for the wear of the brushes, as suggested in the English patent of William Ashby, sealed April 25, 1846. I am also aware that the use of adjusting levers and stepsfand sweeps for collecting material, are not new; and therefore I do not claim these devices, independently of the novelty in conmeshes of the bolt or wire gauze. struction and arrangement of -my machine.

Without this positive action of the brushes upon Having fully'described' my improvements in branthe wire-gauze bolt, the machine would be inoperative dusters, and valueless, because the meshes would soon become What I claim as new therein, and desire to secure so filled with flour as to clog up and stop its work. by Letters Patent, is I As the flour is thus forced through the conical bolts, The combination of the concave adjustable burr 0, it falls upon the floor of the chest A, and is discharged on shaft K, with the adjustable brushes D, bolt B, and through the aperture at the bottom thereof; and the adjustable oil-cup m, for regulating the machine while ofi'al is conducted from the chamber H, at the bottom in motion, substantially as described, and operating as of the bolt, through the inclined spout, to the outside and for the purposes set forth.

through one of the cross-ties, and the upper end of this screw is provided with a milled nut, N, by which burr O and its brushes in proper relation and proximity to the conical boltB.

' The upper end of shaft K is held in a central position by the rail 0, through which it extends.

A suitable spout, or conductor extends from the side of the chamber H through the flour-chest, to convey the bran out of the machine, after the bolting-opera tion has been accomplished. v

The floor of the flour-chamber may be provided with a suitable opening for the discharge of the flour, which may be moved outwardly by the revolving sweeper P,

secured to the shaft K, immediately above the floor;

retain the flour, during the operation, for several days, when it may be removed by hand at the side of the flour-chest, a door being provided for that purpose.

The operation of my machine, which is properly a bolt for separating flour from bran, shorts, ship-stuff, or middlings, is as follows:

The material is fed into the machine through the opening around the shaft K, in the top of chest A, and the revolving burr of brushes, which revolves within of the machine. STEPHEN HUGHES.

The adjustable brushesv D are first set back in the Witnesses:

grooves of the burr C, so as to allow only the ends of H. P. K. PECK,

the brushes to come in contact with the inner face of EWD. J. HUGHES. 

